Alarm.



No. 838,385. PATENTED DEC. 11, 1906.

M. 0; COOPER.

ALARM.

APPLICATION FILED DEC. 13, 1906.

UNITED STATES PATENT OFFICE.

ALARM.

'Lio. 838,385.

Specification of Letters Patent.

Patented Dec. 11, 1906.

Application filed December 13, 1905. Serial No. 291.612.

To all whom it may concern:

Be it known that I, MAXEY C. COOPER, a citizen of the United States, residing at Selma, in the county of Dallas and State of Alabama, have invented new and useful Improvements in Alarms, of which the following is a specification.

My invention relates to alarms; and its primary object is to provide a novel and highly-useful device of this character which may be applied to any construction of bearing and which is adapted to audibly enunci ate the overheating of the hearing.

A further object of the invention is to provide an alarm of this character which is sim ple and durable of construction and one which may be manufactured and sold at a comparatively low cost.

YVith the above and other objects in view the invention consists in the construction, combination, and arrangement of parts hereinafter fully described, claimed, and illustrated in the accompanying drawing, Where in the figure is a view in vertical central section of a bearing equipped with an alarm constructed in accordance with my invention.

Referring to the drawing by reference-numerals, 1 designates a bearing-box, 2 its bearing-brass, and 3 a rotating member embodying in the present instance a shaft journaled within the box 1, the shaft being provided with a lubricant by means of a suit able lubricator 4.

Secured to the top of the bearing-box is a member or standard 5, said member or standard being provided with a laterally-extend ing flange 6, formed integrally with the lower portion thereof and provided with a threaded aperture 7 to permit the passage of a threaded bolt 8 therethrough for engagement with the bearing-box 1, whereby to firmly secure the standard 5 in applied position. The standard 5 is suitably recessed to receive a bulb 9, having a tubular extension 10 rising vertically therefrom, said bulb 9 being readily applied through an opening normally closed by means of a movable section 11. of the standard 5. The section 11 has its inner wall formed to correspond to the contour of the bulb 9 and its extension 10, and it may be hingedly connected to the standard 5 or otherwise secured thereto. The bulb 9 is adapted to contain mercury or other suitable expansible fluid, which rises within the tubular extension 10 when the journal becomes overheated, the heating of the journal being readily conducted to the bulb 9 through the standard 5, which is constructed of a metal having suitable heat-conducting qualities.

A post 12 rises vertically from the standard 5 and has secured thereto agong 13. Fulcrumed upon the bearing at a point diametrically opposed to the post 12, as at 14, is a carrying member or bracket-arm 15, the lower or free end of which is adapted to gravitate in the direction of the shaft 3. A tubular shaft 16 is journaled upon the bracketarm 15 by means of suitable bearings 17, the lower end of the shaft 16 projecting a short distance below the free end of the bracketarm 15 and provided with an enlarged head 18, while its upper end projects beyondthe upper end of the bracket-arm 15 and into the gong 13. The upper end of the shaft 16 is provided with suitable devices for sounding the gong 13 when the shaft is rotated. Telescoped within the shaft 16 is a rod 19, the same being secured in its adjusted position by means of a set-screw 20, carried by the head 18. The lower end of the rod 19 is provided with a friction-gear 21, which is adapted to be brought into engagement with the shaft 3 to impart rotation to the shaft 16 and sound the gong 13. The shaft 16, rod 19, and gear 21 constitute an adjustable signaloperating means or member. The bracketarm 15 is held normally elevated to retain the gear 21 normally out of engagement with the shaft 3 by means of a contractile spring 22, said contractile spring having one of its ends secured to the standard 5, while its other end is secured to the upper end of thebracketarm 15 at a point suitably removed from the fulcrum 14.

A plunger 23 is movably disposed within the tubular extension 10 of the bulb 9 and has connection with the upper end of the arm 15 at a point suitably removed from the fulcrum 14 by means of a pin 24, which pin passes through an elongated slot 25 within the bracket-arm 15, said slot providing a loose connection between the plunger 23 and the bracket-arm 15 to compensate for a rigid connection between the bracket-arm and the standard 5, whereby to permit the free movement of the plunger 23.

When the bearing has become overheated, the mercury within the bulb 9 is caused to rise vertically'within the tubular extension 16 and move the plunger 23 upward against the tension of the spring 22. This upward movement of the plunger 23 causes the lower end of the bracket-arm 15 to move downward and position the gear 21 in engagement with the shaft 3. The rotation of the shaft3 is imparted to the shaft 16 through the gear 21, and the rotation of the shaft 16 causes the gong 13 to sound. After the temperature of the bearing has become normal the mercury within the tubular extension will fall and the spring 22 will move the gear 21 out of engagement with the shaft 3 and retain the alarm out of operation until thebearing has again bGCODZG overheated. A

From the foregoing description, taken in connection with the accompanying drawing, the construction and mode of operation of the invention will be understood Without a further extended description.

Changes in the form, proportions, and minor details of construction may be made Within the scope of the invention without departing from the spirit or sacrificing any of the advantages thereof.

Having fully described and illustrated my invention, what I claim is- 1. In a device of the character described, a bearing, a shaft journaled in the bearing, a bulb provided with a tubular extension and suitably secured to the bearing, an expansible fluid within the bulb, a signal device, a fulcrumed bearing-bracket, a tubular shaft journaled on the bracket-arm, a plunger carried by the bracket-arm and movably disposed within the extension of the bulb, means for retaining the bracketarm normally elevated, a rod telescopically mounted in the shaft, and a gear carried by said rod.

2. In a device of the character described, a bearing, a shaft journaled in the bearing, a signal device, a tubular shaft, a rod telescopically engaging said tubular shaft, a gear carried by the rod, means for retaining the gear normally out of engagement with the firstnamed shaft, and means controlled by the temperature of the bearing for moving the bearing into engagement with said firstnamed shaft.

3. In a device of the character described, a bearing, a shaft journaled in the bearing, a signal device, a fulcrumed bracket-arm, a tubular shaftjournaled on the bracket-arm, a rod telescopically engaging the tubular shaft,

a gear carried by the rod, means for retaining the gear normally out of engagement with the first-named shaft, and means controlled by the temperature of the bearing for moving the gear into engagement with the firstnamed shaft.

4. In a device of the character described, a bearing, a shaft journaled in the bearing, a standard mounted on the bearing, a signal device, a bulb carried by the standard and provided with a tubular extension, an expansible fluid contained within the bulb, a bracket-arm fulcrumed upon the standard and provided with an elongated slot in its upper end, a tubular shaft journaled upon the bracket-arm, a rod telescopically engaging the tubular shaft, a gear carried by the rod, means for retaining the bracket-arm normally elevated, a plunger movably positioned within the tubular extension of the bulb, and means passing through the slot of the bracket-arm for-connecting the plunger and bracket-arm.

In testimony whereof I aflix my signature in presence of two Witnesses.

MAXEY O. COOPER.

WVitnesses:

J. E. DAVIDSON, A. E. PURVIANOE. 

